${\bar{K}}^{\ast }$ meson in nuclear matter

Abstract

The properties of the ${\bar{K}}^{\ast }$ meson in dense matter are studied using a unitary approach in coupled channels within the framework of the local hidden gauge formalism. We obtain the ${\bar{K}}^{\ast }$ spectral function in the nuclear medium and we found that the ${\bar{K}}^{\ast }$ develops an in-medium width up to five times bigger than in free space. We also estimate the transparency ratio of the ${\hat{I}}^{3}A\to K^{+}{K}^{\ast -}{A}^{\prime }$ reaction, which we propose as a feasible experimental scenario to detect in-medium modifications of the ${\bar{K}}^{\ast }$ meson.

6 pages, 5 figures, talk at International Nuclear Physics Conference 2010 (INPC2010), July 4-9, 2010, Vancouver (Canada)